326 



INDEX. 



Fire breaks, 153 

 Fireproof wood, 239 

 Fires in forests, 146 

 causes, 151 

 crown, 148 

 prevention, 152 

 spring, 150 



summer and autumn, 150 

 surface, 148 

 underground, 148 

 Firs, 273 

 Flowers, 6 



Foehn of Switzerland, 32 

 Fogs and clouds, 38 

 Food formation, 8 

 Forest, The, 13 

 Forest and pasture, 137 

 Forest economics, 241 

 Forest-fire law, 257 

 Forest fires, 146 

 Notable, 155 

 Forest floor, 17 

 Forest industries of Minnesota, 



242 

 Forest influences, 21 



on disposal of water supply, 22 

 on fogs and clouds, 38 

 on precipitation, 26 

 on water supplies, 27 

 on wind and hail storms, 37 

 Forest management, 244 

 Forest mensuration, 167 

 Forest planting, 70 

 Forest problems, 195 

 Forest protection, 134 

 Forest-pulled trees, 110 

 Forest regeneration and treat- 

 ment, 61 

 Forest reservation and national 



parks, 250 

 Forest treatment, 61 

 Forest trees of the United States, 



264 

 Forest, Virgin, 62 

 Forest weed, 76 

 Forestry requires capital, 244 

 Forestry vs. I^umbering, 252 

 Forests, windbreaking power 



of, 30 

 Form factor, 169 

 Foxtail Pine, 268 

 Fra.xinus amerioana, 304 



Fraxiiius laiiccolata, 304 



nigra, 303 



oregona, 304 



pennsylvanica, 304 



quadrangulata, 303 

 Freezing and thawing, 139 

 Fremont Cottonwood, 284 

 Frozen plants, Treatment of, 132 

 Frost-cracks, 142 

 Frost, Injuries from, 142 

 Frost, hardy trees, 141 

 Frost, tender trees, 141 

 Fruit, 6 

 Fuel value of woods, 225 



values. Table of, 227 

 Fungi in wood, 230 

 Fungus diseases, 146 

 Fungus, Shelf, 230 



Gathering seeds, 87 

 Georgia Pine, 263 

 Germination of seeds, 87 

 Giant arborvitae, 277 

 Giant Sequoiaj 276 

 Girdling by mice, 136 

 Glauber salts, 221 

 Gleditsia triacanthos, 297 

 Glossary, 307 



Golden-leaf chinquapin, 287 

 Gophers, 132 



Government supervision of for- 

 ests in Germany, 249 

 Grades of nursery stock, 110 

 Graftage, 107 

 Grav Pine, 263 

 Great Silver Fir, 274 

 Green Ash, 304 

 Grindstone, 193 

 Group method, 66 

 Grove, 45 



Growing stock of a forest, 173 

 Growth of trees an index to 



value of land, 19 

 Growth on muskegs, 15 

 Gum, Black, 302 



Cotton, 302 



Tupelo, 302 

 Gymnacladus dioious, 298 



Hackberry, 295 



Hailstorms, Forest influences 

 on, 37 



